Block paving machine and the like



Sept. 29, 1.931. E. KuERTs BLOCK PAVING MACHINE AND THE LIKE Filed Jan. 6, 1928 Jnrentar:

mit Kuer/.s

zlr farney,

"" l f AnV object of Patented Sept. 29, 1931 .UNITED STATES ,PATENT OFFICE ERNST KUERTVS, OF STETTIN, GERMANY i p `BLOCK PAVING MACHINE AND LIKE Application ined `January 6,1928, serial No. 244,813, and in Germany May 27, 1927.

This invention relates Ato a. pavingv machine of the `kind provided with travel wvheels `and furnished with its own motive'y power whereby to move the machine for- 5 wardly for delivering and spreading a ceinenting medium, and to operatethe mechanism and equipment for placing and pressing the paving units in place in the cement ing medium. l.

the invention is the provisionof an improved machine' of the kind referred to and in a manner as hereinafter set Vforth which will embody a forwardly .e positioned hopper for containing the ce-` i l mentmg medium and an underslung extension leading from the hopper for delivering the cementing medium upon the roadway in f the form of a prepared bed, into which the :forming a material tion and in which A further object of my` invention is toI paving units are mechanically set and placed in -rows to form a continuous pavement.

provide a machine of comparatively simple and inexpensive construction, arranged -to be driven forwardly by relatively short stages-and to deliver thecementing medium upon the roadway simultaneously with the ceivmg the paving units or blocks;

forward stages of movement.

Another object is to provide a machine in which the lmechanism for pressing and y setting the paving units is operated during the periods when the machine remains stationary; The machine also involves means whereby the paving units arev arranged in rows in paving order upon the 'machine and held there in paving order during the forward stages of movement of the machine, the rows of paving units at the rear of the machine, from which the machine is .withdrawn on its forward movement, being in the position to be pressed downwardly `into the bed of cementing material. Y

Another object of my invention is to'pro- Vin which all parts of the machine vas well as power'plant supported by thermachine.Lv

A still further object of my invention is to provide means whereby the paving units ing units may be laid with small interstices Ascribed and Vsubsequently incorporated in Alying in interengaged adjacency;

on theV line VS--Sof Fig. 7 the vframes and 'the machine itself are Y operated from a' bed of cementing medium upon the forwardV i movement of the machine.

'An additional object of the invention is to provide means whereby the rows of pavbetween them, and to provide means for pressing the cementing medium between the Y interstices and Vthereafter to lill the inter- .stices in a suitable way.

With the foregoing and other objects in view, the invention consists in the improved paving` machine, and in the form, construction and arrangement or arrangementsv of parts, as will be hereinafter more fully dethe sub'joined claims.

The inventionwill be best understood by referring to the accompanying drawings part of this specifica- Figure l is a diagrammatical side view of a machine made in accordance with the present invention;

Fig. 2 is a top plan view thereof;

Fig. 3 is a plan View of a detail; Y

Fig. 4 is a plan view of a frame for re- Fig. 5 is a transverse section taken on the line 5-5 of Fig. 4, with the frames Fig. 6 shows a modified form of the frame designed for use in obtaining a pavement of blocks or stones staggered in corresponding relation to each other;

Fig. Tshows on a larger scale a modified form of the machine with the kind of frames i illustrated in Figs. 4 and 5; 1

Fig. 8 shows a transverse section take operating means being united; and

Fig. 9 .represents a longitudinal section,

" moreV or less diagrammaticY in character7l L vide a machine of the character describedy through the end of the machine and illustrating means whereby to lill in the interstices between the rows of paving units. 9*

The machine comprises a frame composed of sides 1 connected by transverselyV eX:- tending beams Qiand 3. This framework, at its forward vLend, supports a hopper 4 for containing the cementing medium 5 u.

height of a paving unit. beams 32 and 33 are constantly driven, but

to be delivered at 6 upon the surface of the roadway through an underslung extension or fiat flue structure 9. According to an important feature of my invention, the top of the structure 9 serves as a support for the assembly of the paving units or stones to be placed and pressed into the bed 10.

The transverse beam 2 supports thereon an electiic motor 11, the driving shaft of which operates a pair of engaged bevel wheels 12. It will be noted that the larger wheel 12, which is driven by the smaller one, is fixed to a shaft 13 carrying a worm wheel In engagement with the worm wheel 14 is a worm wheel 15 which is fixed upon a transverse shaft 16. Said shafts 13 and 16 are supported, respectively, in suitable bearings as 13', 3 and 16', 16 on the transverse beam 2. At the ends of the shaft 16 are chain wheels 17 which are connected by chains 18 with the chain wheels 19 which are pivotally mounted in bearings in the sides 1. Projecting from the outer surfaces of the chain wheels 19 are pins 20. Links 21 are pivoted at one end to the pins 2O and at tieir other end to a transverse bar 22 arranged in loiigitudinal slots 23 in the sides 1.

Fixed to the bar 22 is a beam 22 for engaging the paving units which may con sist of blocks, stones or tiling. The bar 22 has a stroke greater than the thickness of the paving units. Said bar is constantly driven; but, as its stroke is greater than the thickness of the paving units, it always moves a short distance rearwardly before it makes contact with the paving units.

The shaft 16 is provided with a chain wheel 23 which is connected through a chain 24 with a chain wheel 25 on av shaft 26, supported in bearings in the sides 1.

Adjacent the sides 1, toothed wheels 27 are arranged on the shaft 26 and these are in engagement with other toothed wheel 28 arranged on a shaft 29 supported in bearings in the sides 1. Each of the shafts 26 and 29 is Vprovided with crank arms 30 to which are pivoted connecting rods 31 which are Journaled 11i suitable bearings in pressure beams 32 and 33. As shown in the drawings, the pressure beam 32 is located somewhat higher than the pressure beam 33, the difference between the levels of the said beams vis about oneehalf the height of a paving unit. pressure beams is greater than half the Said pressure since their full stroke is greater than half of the height of a paving unit, they make K an idle movement for a short distance before abutting against the row of paving units.

In carrying out my invention the rear rlhe stroke of eacli of theA means for driving the same comprising the axle 16 to which is fixed a toothed wheel 34 having engagement with another toothed wheel 35 mounted on a short axle 36 which is suitably journaled in bearings in the beam 2. On the axle 36 is a disk 37 having an angular groove 38 into which extends the rectangularly bent endof 4abar 39 having slidablev movement in a guideway 40 provided in the beam 2. The other end of the bar 39 75 is similarly bent and carries a pin in engagement with the groove 41 of a clutch section 42 slidabl'y mounted on a key 43 of the axle 16. Loosely mounted onthe shaft 16 is a cooperating clutch sectionl 44 formed 80 power from the chain vwheel 46 to achain- 85 wheel 48 mounted on the shaft 49 which carries the rear travel wheels 7. By this arrangement, power may be taken vfrom the motor for turning the rear travel wheels 7 and thereby advancing themachine, it only being necessary when it is desired to advance the machine, to throw the clutch into engagemcnt in a manner that will be readily understood.

rlwo pressure cylinders 5()- are ,supported 95 upon the rear portion of the machine, the

. axles of the cylinders being mounted in suitable bearings in the sides 1. Assuming now that the motor is put moperation with all the parts of the machine in the position il' 100 lustratedin F ig. 1, the pressure beams 32 and 33 will press the underneath rows 0f paving units downwardly into the bed 10. rfhe row of units underlthe beam 33 is pressed all the way. into the bed and to a position where it will be in proper symmetry with the units previously set, while the rows oflunits under the beam 32 is pressed only part way into the bed, that is to say, to a depth equalling about one-half .the height" '110 of the units. lNhile the paving units are being pressed into the bed and during the return movement of the beams upwardly to the positions shown inv Figl, the machine remains stationary. lVhen the beams 32 andl 115 33 have reached their elevated position, the clutch section 42 is moved into engagement with the section 44 soy that the machine will be driven forwardly; and it is to be noted in this connection that the extent of the for-i against the rows of paving units, h oldingi them'in place while the machine moves foi'- wardly. `With the forward movement of the machine, the extension 9 is withdrawn from underneath an additional row of paving units, the arrangement being such that after each forward movement of the machine the f .paving units underneath the pressure beams 32 and 33 can' be pressed downwardly into thebed 10, the paving units under the beam 33 being pressed all the way down as premachine, the beam 2 2 travels back so that a newrow of paving units can be inserted in place upon the underslung extension 9.

During each forward movement ofthe machine a proper quantity of the cementing medium is delivered and spread in the road- `way so that aI continuous bed as 10 is vprovided for the continuous setting in pavement order of the rows of paving units.v

The cementing medium may consist of any sultable ,watery mixture or strong mortar into Awhich to press the paving units and which Vis adapted to harden for firmly consolidating the units in paving position. For instance, it may consist of a solution of cement andV water, vwith or without the addition of sand or similar substance.

1 The hopper 4 is kept substantially full of the cementing medium which naturally gravitates downwardly into and `rearwardly through the'underslung extension 9 to flow against `the last -row of fully set units as Well as against the succeeding row of partially set units; and, as the machine is advanced a step, to flow below the next succeeding row of units as the rear end ofthe extension isi withdrawn therefrom. If, owing to the character of the cementing medium or to Vany inclination of the roadway that causes the machine to tilt or incline forwardly, the cementing medium does not ilow out of the f extension with sufficient volume or rapidity,

\ either the hopper or extension, or both, may

.inspection of Fig. 1, it will be understood vbe equipped' with any well-known type of feeding screw for forcibly sluicing out and` discharging the cementing medium. Such :feeding screws may be conveniently operated by any suitable transmission connections driven from the shaft 16. From an that the pressure cylinders operate to prevent any displaceinent of the previously laid rows of paving material during the comy pacting of the bed as a result of the penef(il) tration thereinto ofthe rows under the presy sure beams 32 and 33.

l In order to prevent the paving vunits from getting out of position before delivery to the bed 10,.a frame 51 (Fig. 4) may be'employed. This frame is provided with' lugs `52 which operate in guides 53 arranged onA the inner surfaces of the sides 1. The sides ofA two cooperating frames 51 may be alt-ernately cut away as Vshown in Fig. 5in order K y v Yof paving .unitsin pavement order,` and Y means` for f automatically maintaining the rows of paving r`units may beobtainedIn,

to have an interfitting engagement. By this arrangement small interstices between `the Fig. :7 I illustrate howthese engaged frames 51A cooperate to produce interstices between the. rows of pavingunits. i When it is desiredto'obtain a` pavement in which the paving units'are .positioned in`V alstaggered relation, a frame as 55 (Fig. 6)

may be employed.

Itis to beunderstood; that when-the machine is used without-frames such :as 51 and 55', there will beno interstices inthe pavement.. y 1..

In-Fig'. 9, Ihaveshowndiagramin'atically another type-of apparatus forproduciiig the interstices. .In this instancev I employ `anextra pressurebeam 56, the lower surface of which correspondsv to the form of the frames 51 or 55, as the case may be. The :beam 56 maybe operated in exactly th'efsame manner as thebea1n33 (I1`ig.1), it being only necessary to add the necessary additional toothed` wheels7 lfor engagement 'withi vthe Ldriving wheel 28, so that the rbeam 56 will be periodically lowered andllifted.- As illustrated in Fig. 9, the beam 56 is designedso as to press down the cementing medium,V in the inter-` stices. If desired, av blower 57 may be arranged toclean the Aintersti'ces,and,` after such cleaning,

a supply-'receptacle 59Y may be-.arranged to fill the ,interstices with cementing material suitable for the purpose.

From the foregoing, taken inconnection withV the accompanying drawings, itwill be manifest that .I have disclosed an extremely simple vand practical paving machine and one which embodies the features of-'advan-.

tage enumerated in the statementZ 'of inveiition. While lI have, in the present instance, shown and described the preferred embodiments of my invention, it is to beunderstood that the same are susceptible of modification in.. various particulars without departing from the spirit or scope of, my invention or sacrificing any of its advantages.

Iclaim:l 'Y l i 1. In a machine of thecharacterdescribed,v ,consisting ,ofl a frame supportedby axles with Wheels, powerv meansl supported by. the frame, means supported-.bythey frame `'for transmitting power from thewpower means to certain of theaxles whereby to advancethe machine, a hopper-disposed on the front of the frametoreceiveand hold cementing material and provided' with an underslung extension extending toward-"therear' of lthe machine, said lextension frecei-ving the mal teri'al'from the hopper vandaffording a passage for the v"n'ioveincisnt ofthe' material to the rear-of lthe' machine for delivery upon the road way to provide a bed in-the road way, the top ofsaid` extensionfaffordinga rows of .paving units-n pavement Order ifio fao

aduring relative advancement of` the msi-- the top of said 'extension' affording a plat- 2. In a machine of the character described,

consisting of a frame supported by axles .f l

-beam for .maintaining therows of paving' with wheels, power meanssupported by the -frame, means supported by the frame for transmitting power 'from the power meansL -tocertain of the axles whereby to advancev V`the machine, a hopperdisposcd on thefront ofthe frame to receive and hold cementing material and provided with an underslung yextension extending toward the rear of the machine, said extension receiving the material from the hopper and affording a pas- 'sage for the movement of the material toV the rear of the `machine for delivery vupon the road way, the top of said extension afi fording a platform :tor the assembly thereon of rows of paving` units in pavement order, means for automatically maintaining the rows of paving units in pavement order during relative advancement of the -machine and. as well during the consequent with-- ldrawal of the extension from underneath the rear rows, said means including pressure beams acting upon said rear rows.

3. In a machine of the character described, consisting of a frame supported by axles with wheels, power means supported by the frame, means supported by the frame for transmitting power from the power means to certain of the axles whereby to advance the machine, a hopper disposed on the front ofthe frame to receive and hold cementing material and provided with an underslung extension extending toward the rear of the machine, said extension receiving the 'materiale-from the hopper and affording a pasf sage for the movement of the material to the rear vol the machine for delivery upon lthe road way to provide a bed v'in the road "way, the top of said extension affording a platform for the assembly thereon of rows of paving units in pavement order, a movable beam for maintaining the rows of pave A-ing units in pavement order during the advancement of the machine', to bring vthe rear said extension affording a platform for the rows upon the bedof cementing material consequent'lupon the withdrawal of `the extension in accompaniment with the advancementl of the machine.

4. In a machine of the character described, consisting of a frame supported -by axles with wheels, power means supported by the frame, means supported by the frame for transmitting power from the power means l to certain of the axles whereby tov advancethe machine, a hopper disposed on the front of the frame to receive and hold cementing material and provided with an underslung extension extending toward the rear of themacliine, said extension receiving the mate' rear of themachine for delivery upon'v thev roa-dlw'ay tov provide a bed inthe road way,

form. for the assembly lthereon of rowsv of paving units ,in pavement order, a movable units in pavement order duringthe advancement oithe'machine, to 'bring and release the rear rows upon .the bed of cementing material consequent upon the withdrawal of 'theextension in .accompaniment with the" advancement of the machine, ,and means for pressing saidreleased rear rows downwardly into the cementing material.

5. In, a machine Vof rthe character described, consisting of a frame supported by axles with lwheeis,.power means supported by the frame, means supported by the frame vfor transmitting power from the power means to certain of' the axles whereby to advance the machine, a hopper disposed on the" iront ol the frame to receive and hold cementing material, an extension'leading from the lepper to the i'ear of the machine and forming a lpassage for the movement of the material from the hopper to the rear of the machine foi-delivery upon the road way to provide a bed inthe road way, the top ot said extensionaifording a lplatform .for the assembly thereon ot. rows of paving units in parement order, means lior maintaining' saidunits in pavement order during the advancement of the machine and to enable the rear units 'to be released so as to rest upon the bed, and mechanism arranged to be operated by the power means for pressing theI released units into the bed.

6. In a machine of the character described, consisting of a wheeled frame adapted for advancing movement, a hopper on the forward part of the frame andr adapted to receive and hold a cementing material, an extension extending Jrom said hopper toward the rear of the machine and formingafpassage for the movement of material 'iom'the hopper to the rear of the machine for delivery upon the road way to provide a bed inthey road way, the top of assembly thereon ot' paving units in pavement order, means for maintaining the units in pavement order during the advancement of the machine, to enable thel units at the rear of the extension to be released so to rest in pavement order vupon the bed, and

'the means whereby automatically to press the released units into the bed.

7. In a machine ofv the character described, consisting vof a wheeled frame adapted `for advancing' movement, a hopper on the forward part of the frame and adapted to-receive and hold cemeiiting material, an extension extending :trom said hopper toward the rear of the machine and formino' a passage for the movement of material I'rom the hopper to the -rear of the ien machine for delivery upon the road way to provide a bed in the road way, the top of said extension affording a platform for the assembly thereon of paving units in pavement order, means for maintaining the units in pavement order during the advancement of the machine tol enable the units at the rear of the extension to be released so as to rest in pavement order upon the bed, pressure means for pressing the released units into the bed, unit receiving frames associated with said pressure means, the latter being formed with notches `which engage parts of the unit receiving frames when pressed downwardly, the said unit receiving frames being shaped so that the walls of the adjacent frames are in the same plane.

8. In a machine of the character described, consisting of a wheeled frame adapted for advancing movement, a hopper adapted to receive and hold a cementing medium, an extension for 'the hopper forming a passage for the movement of material to the rearV of the machine for deliveryvupon the road way to provide a bed in the road way, the top of said extension affording `a platform for the assembly thereon of paving units in pavement order,power actuated means to drive the machine forward, means for maintaining the units in pavement order during forward movement of the machine and to permit the units at the rear of the extension to be released to rest upon the bed, and means under the control of the power actuatedV means for pressing the released units downwardly into the bed.

9. In a machine of the character described, consisting of a wheeled frame adapted for advancing movement, a hopper on the forward part of the machine adapted to receive and hold cementing material, an extension for the hopper forming a passage for the movement of material to the rear of the machine for delivery upon the road way to provide a bed in the road way, the top of said extension affording a platform for the asasembly thereon of paving units in pavement order, power actuated means to drive the machine forward, means for maintaining the units in pavement order during forward movement of the machine and to permit the units at the rear of the extension to be released to rest upon thebed, means under the control of the power actuated means for pressing the released units downwardly into the bed, pressure cylinders for preventing the displacement of the units pressed into the bed, a vertically movable beam'for forming grooves between the pressed units, and means for filling the grooves.

In testimony that I claim the foregoing as my invention,`I have signed my name.

ERNST KERTS. 

